Electric Charge: Crash Course Physics #25
Moving on to our unit on the Physics of Electricity, it's time to talk about charge. What is charge? Is there a positive and negative charge? What do those things mean? In this episode, Shini...
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The shock you get from a doorknob. That trick you used to do with a balloon, to make your hair stick up. Or, of course, a lightning strike. They’re all governed by the same principle: static electricity. Static electricity occurs when an object obtains a net amount of positive or negative electric charge, creating an imbalance that wants to be returned to equilibrium. Its effects aren’t always as dramatic as lightning, though. Let’s take two pieces of tape that are both stuck to a table. If you rip them both off the table and try to stick them together, that should be easy enough, right? But it turns out that they repel one another. But try this: Stick one on top of the other, rip the pair off the table, and then separate the pieces. They’re no lo...
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The shock you get from a doorknob. That trick you used to do with a balloon, to make your hair stick up. Or, of course, a lightning strike. They’re all governed by the same principle: static electricity. Static electricity occurs when an object obtains a net amount of positive or negative electric charge, creating an imbalance that wants to be returned to equilibrium. Its effects aren’t always as dramatic as lightning, though. Let’s take two pieces of tape that are both stuck to a table. If you rip them both off the table and try to stick them together, that should be easy enough, right? But it turns out that they repel one another. But try this: Stick one on top of the other, rip the pair off the table, and then separate the pieces. They’re no lo...
